Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4437
Number of amino acids:444
Molecular Weight:45600.32 Da
Theoretical pI:8.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4810.81%
Cysteine CYS (C)143.15%
Glutamic Acid GLU (E)163.6%
Aspartic Acid ASP (D)224.95%
Glycine GLY (G)4710.59%
Phynylalanine PHE (F)92.03%
Isoleucine ILE (I)337.43%
Histidine HIS (H)71.58%
Lysine LYS (K)409.01%
Methionine MET (M)61.35%
Leucine LEU (L)286.31%
Asparagine ASN (N)316.98%
Glutamine GLN (Q)40.9%
Proline PRO (P)255.63%
Serine SER (S)327.21%
Arginine ARG (R)51.13%
Threonine THR (T)327.21%
Tryptophan TRP (W)40.9%
Valine VAL (V)378.33%
Tyrosine TYR (Y)40.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1995
HydrogenH3256
NitrogenN552
OxygenO624
SulphurS20

FormulaC1995H3256N552O624S20
Total Number of Atoms:6447


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28835
Absorption 0.1% (=1 g/l)    0.632,   assuming all pairs of CYS residues form cystines

Ext. coefficient    27960
Absorption 0.1% (=1 g/l)    0.613,   assuming all CYS residues are reduced
Aromaticity:0.038

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.90, 30.41, 22.07]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:88.5585
Grand average of hydropathicity (GRAVY):-0.01